Communication-centered integrated visible light communication and positioning with specular reflecting RIS-based...

Area of Science:

• Optical Communications
• Wireless Networking
• Sensing Technologies

Background:

• Visible Light Communication and Positioning (VLCP) systems offer simultaneous data transmission and localization.
• Reconfigurable Intelligent Surfaces (RIS) can dynamically control wireless environments.
• Liquid Crystal (LC) technology presents opportunities for advanced optical receiver design.

Purpose of the Study:

• To investigate an integrated VLCP system employing mirror array-based smart walls and LC-based receivers.
• To optimize system parameters for simultaneous communication, localization, and illumination.
• To address a communication-centered VLCP system with constraints on positioning accuracy and illumination.

Main Methods:

• Deployment of smart walls with tunable mirrors (RIS) and LC-based RIS receivers.
• Joint optimization of power allocation, LC refractive index, and mirror orientations.
• Application of an alternative optimization algorithm, including successive convex approximation and greedy algorithms, to solve the complex optimization problem.

Main Results:

• The proposed VLCP system enables simultaneous communication, localization, and illumination.
• Optimization of adjustable parameters significantly influences communication rate, localization accuracy, and illuminance.
• Simulation results demonstrate performance improvements in the VLCP system with RIS integration.

Conclusions:

• The integration of mirror array-based smart walls and LC-based RIS receivers enhances VLCP system performance.
• The proposed optimization framework effectively addresses the challenges of high-dimensional optimization problems.
• The developed VLCP system shows promise for advanced indoor wireless applications requiring integrated functionalities.